What is ICC?
ICC, short name for International Color Consortium, is used as the file extension for International Color Consortium files.
.ICC files are binary files that are used to store ICC profiles
See the sample .ICC file included below.

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A

File Extension: .ICC

MIME Type: application/octet-stream

File Content: International Color Consortium

.ICC files are International Color Consortium files saved as binary files.
Here are the first 64 bytes of a sample .ICC file, wsRGB.icc, dumped in HEX values: